It's bad advice in software. Software that's "boring" tends to be replaced with flashy new things. If you were an expert in JQery in 2010, unless you've learned

It's bad advice in software. Software that's "boring" tends to be replaced with flashy new things. If you were an expert in JQery in 2010, unless you've learned the new frameworks you would be nearly unemployable today. I was an "expert" in OSGi, a Java framework... it went out of fashion in the early 2010's. My knowledge of that became nearly useless, the only "utility" I got out of it today is understanding modularity and dynamic services much better than I would otherwise (which can be frustrating though, as you see new flashy thhings making the same mistakes you've seen before, but try telling them that and they'll just call you a dinosaur who doesn't get it).